package com.string.utils;

public class AppendString {

	public static void main(String[] args) {
		StringBuilder str=new StringBuilder();
		str.append("jaewkjldfxmopzdm");
		for(int i=str.length()-3;i>0;i=i-3){
			str.insert(i,',');
		}
        System.out.println(str.toString());
	}

}